Physics 9702 · AS & A Level · The diffraction grating

The diffraction grating — practice question

Green light falls normally on a diffraction grating and produces a diffraction pattern on a screen far away. Which change, on its own, would reduce the spacing between the diffraction maxima on the screen?

  • AIncrease the distance between the screen and the diffraction grating.
  • BReplace the diffraction grating with a grating that has a smaller separation between the slits.
  • CReplace the diffraction grating with a grating that has fewer slits per unit length.
  • DReplace the green light with red light.

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